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Questions Tagged with "wick theorem"

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Normal Order of Normal Order

2 answer

Physics Asked 2 years ago

Normal Order of Normal Order

2 answer

Physics Asked 2 years ago by MaPo

Complex Fields, Propagators, Wick's Theorem and Feynman Diagrams

1 answer

Physics Asked 2 years ago

$phi^4$-theory, S-matrix Feynman diagram to first order from Peskin and Schroeder

1 answer

Physics Asked 2 years ago

Meaning of a strange Feynman diagram for the $phi^3$ scalar Field theory

1 answer

Physics Asked 2 years ago

Why do we have $[phi_1^+,:phi_2phi_3:]=:[phi_1^+,phi_2^-]phi_3:+:phi_2[phi_1^+,phi_3^-]:$?

1 answer

Physics Asked 2 years ago by ketherok

On contractions and S-Matrix in $phi^4$ scalar theory

1 answer

Physics Asked 2 years ago

Why does the 3-point function of a real scalar field vanish?

2 answer

Physics Asked 2 years ago

Baker-Hausdorff for normal ordering exponential

1 answer

Physics Asked 2 years ago

If $|psirangle$ is a free fermionic state, why does its reduced density matrix $text{Tr}_C(|psirangle langle psi|)$ also obey Wick's theorem?

1 answer

Physics Asked 2 years ago

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